Javasript Autosubmit won't work in IE

I have a page that displays data from a database.  At the top of the page is a select box that allows you to sort the data various ways.  I don't want a submit button, just an onchange type event.  Right now, when you change the select box, it reloads the page with the sort.  But it will not work in IE.  Everything but IE works perfect.

Any ideas on how I can code this so that IE will auto submit as well?

<form method="POST" name="sortForm" id="sortForm" action="<?php $_SERVER['PHP_SELF'] ?>" onchange="javascript:document.sortForm.submit();"
   <b>Sort Order : </b>
   <select name="sort" id="sort">
      <option value="id" <?php if ($sort == "null"){ ?> SELECTED <?php } ?> >ID</option>
      <option value="stuName" <?php if ($sort == "stuName"){ ?> SELECTED <?php } ?> >Name</option>
      <option value="contEmail" <?php if ($sort == "contEmail"){ ?> SELECTED <?php } ?> >E-mail</option>
      <option value="loanSemester" <?php if ($sort == "loanSemester"){ ?> SELECTED <?php } ?> >Semester</option>
      <option value="status" <?php if ($sort == "status"){ ?> SELECTED <?php } ?> >Status</option>
   </select>
</form>

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